AMPS C/C++ Client Class Reference AMPS C/C++ Client Version 5.3.5.6

BlockPublishStore.hpp
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25
26 #ifndef _BLOCKPUBLISHSTORE_H_
27 #define _BLOCKPUBLISHSTORE_H_
28 #include <amps/ampsplusplus.hpp>
29 #include <amps/BlockStore.hpp>
30 #include <amps/Buffer.hpp>
31 #include <sstream>
32 #include <stack>
33 #include <string>
34 #include <map>
35 #include <amps/ampscrc.hpp>
36 #if __cplusplus >= 201103L || _MSC_VER >= 1900
37 #include <atomic>
38 #endif
39
40 #ifdef _WIN32
41 #include <intrin.h>
42 #include <sys/timeb.h>
43 #else
44 #include <sys/time.h>
45 #endif
46 #include <iostream>
47
52
53 namespace AMPS
54 {
60 class BlockPublishStore : public StoreImpl
61 {
62 public:
63 typedef BlockStore::Block Block;
64 typedef Lock<BlockStore> BufferLock;
65 typedef Unlock<BlockStore> BufferUnlock;
66
67 typedef enum
68 {
69 SOW_DELETE_DATA = 0x01,
70 SOW_DELETE_FILTER = 0x02,
71 SOW_DELETE_KEYS = 0x04,
72 SOW_DELETE_BOOKMARK = 0x08,
73 SOW_DELETE_BOOKMARK_CANCEL = 0x10,
74 SOW_DELETE_UNKNOWN = 0x80
75 } SowDeleteType;
76
79 enum Constants : amps_uint32_t
80 {
81 DEFAULT_BLOCK_HEADER_SIZE = 32,
82 DEFAULT_BLOCK_CHAIN_HEADER_SIZE = 64,
83 DEFAULT_BLOCKS_PER_REALLOC = 1000,
84 DEFAULT_BLOCK_SIZE = 2048
85 };
86
87 /**********************************************************************
88 * Storage format
89 *************************************************************************
90 * Field Description | Type | # Bytes
91 *************************************************************************
92 * HEADER as detailed below | | 32 TOTAL
93 * | |
94 * Total number of blocks used by the record | uint32_t | 4
95 * Total length of the saved record | uint32_t | 4
96 * HA Message sequence | uint64_t | 8
97 * CRC Value - only set in first Block | uint64_t | 8
98 * next in chain offset | uint64_t | 8
99 *************************************************************************
100 * CHAIN HEADER as detailed below | | 64 TOTAL
101 * | |
102 * operation | uint32_t | 4
103 * command id length | uint32_t | 4
104 * correltation id length | uint32_t | 4
105 * expiration length | uint32_t | 4
106 * sow key length | uint32_t | 4
107 * topic length | uint32_t | 4
108 * sow delete flag | int32_t | 4
109 * ack types | uint32_t | 4
110 * unused [8] | uint32_t | 4*8 = 32
111 *************************************************************************
112 * DATA SECTION - can be spread across multiple blocks
113 *
114 * command id | char[]
115 * correlation id | char[]
116 * expiration | char[]
117 * sow key | char[]
118 * topic | char[]
119 * data | char[]
120 *************************************************************************/
121
122 struct BlockHeader
123 {
124 amps_uint32_t _blocksToWrite;
125 amps_uint32_t _totalRemaining;
126 amps_uint64_t _seq;
127 amps_uint64_t _crcVal;
128 amps_uint64_t _nextInChain;
129 };
130
131 struct BlockChainHeader
132 {
133 amps_uint32_t _operation;
134 amps_uint32_t _commandIdLen;
135 amps_uint32_t _correlationIdLen;
136 amps_uint32_t _expirationLen;
137 amps_uint32_t _sowKeyLen;
138 amps_uint32_t _topicLen;
139 amps_int32_t _flag;
140 amps_uint32_t _ackTypes;
141 amps_uint32_t _unused[8];
142 BlockChainHeader() // -V730
143 : _operation(0), _commandIdLen(0), _correlationIdLen(0)
144 , _expirationLen(0), _sowKeyLen(0), _topicLen(0), _flag(-1)
145 , _ackTypes(0)
146 { ; }
147 };
148
153 static inline amps_uint32_t getBlockHeaderSize()
154 {
155 return DEFAULT_BLOCK_HEADER_SIZE;
156 }
157
163 static inline amps_uint32_t getBlockChainHeaderSize()
164 {
165 return DEFAULT_BLOCK_CHAIN_HEADER_SIZE;
166 }
167
171 inline amps_uint32_t getBlockSize()
172 {
173 return _blockStore.getBlockSize();
174 }
175
179 inline amps_uint32_t getBlockDataSize()
180 {
181 return _blockStore.getBlockSize() - getBlockHeaderSize();
182 }
183
199 BlockPublishStore(Buffer* buffer_,
200 amps_uint32_t blocksPerRealloc_ = 1000,
201 bool isFile_ = false,
202 bool errorOnPublishGap_ = false,
203 amps_uint32_t blockSize_ = DEFAULT_BLOCK_SIZE)
204 : StoreImpl(errorOnPublishGap_)
205 , _blockStore(buffer_, blocksPerRealloc_,
206 DEFAULT_BLOCK_HEADER_SIZE,
207 (blockSize_ > DEFAULT_BLOCK_HEADER_SIZE * 2
208 ? blockSize_ : DEFAULT_BLOCK_HEADER_SIZE * 2))
209 , _metadataBlock(0)
210 , _maxDiscarded((amps_uint64_t)0), _lastSequence((amps_uint64_t)1)
211 , _stored(0)
212 {
213 _blockStore.setResizeHandler(&BlockPublishStore::canResize, (void*)this);
214 chooseCRC(isFile_);
215 if (!isFile_)
216 {
217 // This gets set in recover in file-based stores
218 BufferLock bufferGuard(_blockStore);
219 _blockStore.init();
220 _metadataBlock = _blockStore.get(1);
221 // Remove metadata block from used list
222 _blockStore.setUsedList(0);
223 _blockStore.setEndOfUsedList(0);
224 // Metadata block holds block size, block header size,
225 // last discarded sequence, client version
226 _metadataBlock->_sequence = (amps_uint64_t)0;
227 Buffer* pBuffer = _blockStore.getBuffer();
228 pBuffer->setPosition(_metadataBlock->_offset);
229 pBuffer->putUint32((amps_uint32_t)getBlockSize());
230 pBuffer->putUint32((amps_uint32_t)getBlockHeaderSize());
231 pBuffer->putUint64((amps_uint64_t)0);
232 // Metadata blocks puts client version in CRC position
233 pBuffer->putUint64((amps_uint64_t)VersionInfo::parseVersion(AMPS_CLIENT_VERSION));
234 // No next in chain
235 pBuffer->putUint64((amps_uint64_t)0);
236 }
237 }
238
241 virtual ~BlockPublishStore()
242 {
243 }
244
251 virtual amps_uint64_t store(const Message& message_)
252 {
253 return store(message_, true);
254 }
255
266 amps_uint64_t store(const Message& message_, bool assignSequence_)
267 {
268 const char* commandId, *correlationId, *expiration, *sowKey,
269 *topic, *data;
270 size_t dataLen = 0;
271 BlockHeader blockHeader;
272 BlockChainHeader chainHeader;
273 message_.getRawCommandId(&commandId, &dataLen);
274 chainHeader._commandIdLen = (amps_uint32_t)dataLen;
275 message_.getRawCorrelationId(&correlationId, &dataLen);
276 chainHeader._correlationIdLen = (amps_uint32_t)dataLen;
277 message_.getRawExpiration(&expiration, &dataLen);
278 chainHeader._expirationLen = (amps_uint32_t)dataLen;
279 message_.getRawSowKey(&sowKey, &dataLen);
280 chainHeader._sowKeyLen = (amps_uint32_t)dataLen;
281 message_.getRawTopic(&topic, &dataLen);
282 chainHeader._topicLen = (amps_uint32_t)dataLen;
283 message_.getRawData(&data, &dataLen);
284 chainHeader._flag = -1;
285 Message::Command::Type operation = message_.getCommandEnum();
286 chainHeader._operation = (amps_uint32_t)operation;
287 if (operation == Message::Command::SOWDelete)
288 {
289 if (dataLen > 0)
290 {
291 chainHeader._flag = SOW_DELETE_DATA;
292 }
293 else
294 {
295 message_.getRawFilter(&data, &dataLen);
296 if (dataLen > 0)
297 {
298 chainHeader._flag = SOW_DELETE_FILTER;
299 }
300 else
301 {
302 message_.getRawSowKeys(&data, &dataLen);
303 if (dataLen > 0)
304 {
305 chainHeader._flag = SOW_DELETE_KEYS;
306 }
307 else
308 {
309 message_.getRawBookmark(&data, &dataLen);
310 chainHeader._flag = SOW_DELETE_BOOKMARK;
311 // Check options for cancel
312 Message::Field options = message_.getOptions();
313 size_t remaining = options.len();
314 const void* next = NULL;
315 const void* start = (const void*)(options.data());
316 // Not necessarily null-terminated so no strstr
317 while (remaining >= 6 &&
318 (next = memchr(start, (int)'c', remaining)) != NULL)
319 {
320 remaining = (size_t)next - (size_t)start;
321 if (remaining >= 6 && strncmp((const char*)start,
322 "cancel", 6) == 0)
323 {
324 chainHeader._flag = SOW_DELETE_BOOKMARK_CANCEL;
325 break;
326 }
327 }
328 }
329 }
330 }
331 }
332 blockHeader._totalRemaining = (
333 (chainHeader._operation == Message::Command::Unknown)
334 ? 0
335 : (getBlockChainHeaderSize()
336 + chainHeader._commandIdLen
337 + chainHeader._correlationIdLen
338 + chainHeader._expirationLen
339 + chainHeader._sowKeyLen
340 + chainHeader._topicLen
341 + (amps_uint32_t)dataLen));
342 size_t lastBlockLength = ((operation == Message::Command::Unknown) ? 0 :
343 (blockHeader._totalRemaining % getBlockDataSize()));
344 blockHeader._blocksToWrite = ((operation == Message::Command::Unknown)
345 ? 1
346 : ((amps_uint32_t)(blockHeader._totalRemaining
347 / getBlockDataSize())
348 + ((lastBlockLength > 0) ? 1 : 0)));
349 blockHeader._crcVal = (amps_uint64_t)0ULL;
350 blockHeader._crcVal = _crc(commandId,
351 chainHeader._commandIdLen,
352 blockHeader._crcVal);
353 blockHeader._crcVal = _crc(correlationId,
354 chainHeader._correlationIdLen,
355 blockHeader._crcVal);
356 blockHeader._crcVal = _crc(expiration,
357 chainHeader._expirationLen,
358 blockHeader._crcVal);
359 blockHeader._crcVal = _crc(sowKey,
360 chainHeader._sowKeyLen,
361 blockHeader._crcVal);
362 blockHeader._crcVal = _crc(topic,
363 chainHeader._topicLen,
364 blockHeader._crcVal);
365 blockHeader._crcVal = _crc(data, dataLen, blockHeader._crcVal);
366
367 // Reserve slots for storage, growing if necessary
368 BufferLock bufferGuard(_blockStore);
369 Block* first = _blockStore.get(blockHeader._blocksToWrite);
370 if (assignSequence_)
371 {
372 if (_lastSequence <= 2)
373 {
374 _getLastPersisted();
375 }
376 blockHeader._seq = ++_lastSequence;
377 }
378 else
379 {
380 blockHeader._seq = amps_message_get_field_uint64(
381 message_.getMessage(),
382 AMPS_Sequence);
383 if (!_maxDiscarded)
384 {
385 _maxDiscarded = blockHeader._seq - 1;
386 }
387 if (blockHeader._seq >= _lastSequence)
388 {
389 _lastSequence = blockHeader._seq;
390 }
391 }
392
393 try
394 {
395 size_t topicWritten = 0UL;
396 size_t dataWritten = 0UL;
397 size_t commandWritten = 0UL;
398 size_t correlationWritten = 0UL;
399 size_t expirationWritten = 0UL;
400 size_t sowKeyWritten = 0UL;
401 Buffer* pBuffer = _blockStore.getBuffer();
402 for (Block* next = first; next; next = next->_nextInChain)
403 {
404 next->_sequence = blockHeader._seq;
405 if (next->_nextInChain)
406 {
407 blockHeader._nextInChain = next->_nextInChain->_offset;
408 }
409 else
410 {
411 blockHeader._nextInChain = (amps_uint64_t)0;
412 }
413 // Set buffer to start of Block and write the header
414 pBuffer->setPosition(next->_offset);
415 pBuffer->putBytes((const char*)&blockHeader, sizeof(BlockHeader));
416 // Clear crcVal, as it's only written in the first Block
417 blockHeader._crcVal = (amps_uint64_t)0;
418 size_t bytesRemaining = getBlockDataSize();
419 if (next == first)
420 {
421 // Write Block chain header
422 chainHeader._ackTypes = (amps_uint32_t)message_.getAckTypeEnum();
423 pBuffer->putBytes((const char*)&chainHeader,
424 sizeof(BlockChainHeader));
425 pBuffer->setPosition(next->_offset + getBlockHeaderSize() + getBlockChainHeaderSize());
426 bytesRemaining -= getBlockChainHeaderSize();
427 }
428 else
429 {
430 pBuffer->setPosition(next->_offset + getBlockHeaderSize());
431 }
432
433 if (commandWritten < chainHeader._commandIdLen)
434 {
435 size_t commandWrite = (chainHeader._commandIdLen - commandWritten < bytesRemaining) ? chainHeader._commandIdLen - commandWritten : bytesRemaining;
436 pBuffer->putBytes(commandId + commandWritten,
437 commandWrite);
438 bytesRemaining -= commandWrite;
439 commandWritten += commandWrite;
440 }
441 if (correlationWritten < chainHeader._correlationIdLen)
442 {
443 size_t correlationWrite = (chainHeader._correlationIdLen - correlationWritten < bytesRemaining) ? chainHeader._correlationIdLen - correlationWritten : bytesRemaining;
444 pBuffer->putBytes(correlationId + correlationWritten,
445 correlationWrite);
446 bytesRemaining -= correlationWrite;
447 correlationWritten += correlationWrite;
448 }
449 if (bytesRemaining > 0 && expirationWritten < chainHeader._expirationLen)
450 {
451 size_t expWrite = (chainHeader._expirationLen - expirationWritten < bytesRemaining) ? chainHeader._expirationLen - expirationWritten : bytesRemaining;
452 pBuffer->putBytes(expiration + expirationWritten, expWrite);
453 bytesRemaining -= expWrite;
454 expirationWritten += expWrite;
455 }
456 if (bytesRemaining > 0 && sowKeyWritten < chainHeader._sowKeyLen)
457 {
458 size_t sowKeyWrite = (chainHeader._sowKeyLen - sowKeyWritten < bytesRemaining) ? chainHeader._sowKeyLen - sowKeyWritten : bytesRemaining;
459 pBuffer->putBytes(sowKey + sowKeyWritten, sowKeyWrite);
460 bytesRemaining -= sowKeyWrite;
461 sowKeyWritten += sowKeyWrite;
462 }
463 if (bytesRemaining > 0 && topicWritten < chainHeader._topicLen)
464 {
465 size_t topicWrite = (chainHeader._topicLen - topicWritten
466 < bytesRemaining)
467 ? chainHeader._topicLen - topicWritten
468 : bytesRemaining;
469 pBuffer->putBytes(topic + topicWritten, topicWrite);
470 bytesRemaining -= topicWrite;
471 topicWritten += topicWrite;
472 }
473 if (bytesRemaining > 0 && dataWritten < dataLen)
474 {
475 size_t dataWrite = (dataLen - dataWritten < bytesRemaining) ?
476 dataLen - dataWritten : bytesRemaining;
477 pBuffer->putBytes(data + dataWritten, dataWrite);
478 bytesRemaining -= dataWrite;
479 dataWritten += dataWrite;
480 }
481 }
482 }
483 catch (const AMPSException&)
484 {
485 _blockStore.put(first);
486 throw;
487 }
488 AMPS_FETCH_ADD(&_stored, 1);
489 return blockHeader._seq;
490 }
491
498 virtual void discardUpTo(amps_uint64_t index_)
499 {
500 // Get the lock
501 BufferLock bufferGuard(_blockStore);
502 Buffer* pBuffer = _blockStore.getBuffer();
503 // Don't use _getLastPersisted() here, don't want to set it
504 // to something other than index_ if it's not already set
505 amps_uint64_t lastPersisted = _metadataBlock->_sequence;
506 // Make sure it's a real index and we have messages to discard
507 if (index_ == (amps_uint64_t)0 || !_blockStore.front() || index_ <= _maxDiscarded)
508 {
509 // During logon it's very possible we don't have a last persisted
510 // but that the Client is calling discardUpTo with the ack value.
511 if (lastPersisted < index_)
512 {
513 pBuffer->setPosition(_metadataBlock->_offset + 8);
514 pBuffer->putUint64(index_);
515 _metadataBlock->_sequence = index_;
516 if (_maxDiscarded < index_)
517 {
518 _maxDiscarded = index_;
519 }
520 if (_lastSequence <= index_)
521 {
522 _lastSequence = index_;
523 }
524 }
525 else if (!index_) // Fresh logon, no sequence history
526 {
527 _getLastPersisted();
528 }
529 else if (getErrorOnPublishGap() && index_ < lastPersisted) //Message gap
530 {
531 std::ostringstream os;
532 os << "Server last saw " << index_ << " from Client but Store "
533 << "has already discarded up to " << lastPersisted
534 << " which would leave a gap of unreceived messages.";
535 throw PublishStoreGapException(os.str());
536 }
537 _blockStore.signalAll();
538 return;
539 }
540
541 _maxDiscarded = index_;
542 AMPS_FETCH_SUB(&_stored, _blockStore.put(index_));
543 _blockStore.signalAll();
544 if (lastPersisted >= index_)
545 {
546 return;
547 }
548 pBuffer->setPosition(_metadataBlock->_offset + 8);
549 pBuffer->putUint64(index_);
550 _metadataBlock->_sequence = index_;
551 if (_lastSequence < index_)
552 {
553 _lastSequence = index_;
554 }
555 }
556
561 void replay(StoreReplayer& replayer_)
562 {
563 // Get the lock
564 BufferLock bufferGuard(_blockStore);
565 // If we don't have anything yet, return
566 if (!_blockStore.front())
567 {
568 return;
569 }
570 Block* next = _blockStore.front();
571 try
572 {
573 for (Block* block = _blockStore.front(); block; block = next)
574 {
575 // Replay the message
576 replayOnto(block, replayer_);
577 next = block->_nextInList;
578 }
579 }
580 catch (const StoreException&)
581 {
582 _blockStore.putAll(next);
583 throw;
584 }
585 }
586
593 bool replaySingle(StoreReplayer& replayer_, amps_uint64_t index_)
594 {
595 BufferLock bufferGuard(_blockStore);
596 // If we don't have anything yet, return
597 if (!_blockStore.front())
598 {
599 return false;
600 }
601 // Get the end point
602 amps_uint64_t lastIdx = _blockStore.back()->_sequence;
603 // Get the start point
604 amps_uint64_t leastIdx = _blockStore.front()->_sequence;
605 if (index_ >= leastIdx && index_ <= lastIdx)
606 {
607 Block* block = _blockStore.front();
608 while (block && block->_sequence != index_)
609 {
610 block = block->_nextInList;
611 }
612 if (!block)
613 {
614 return false;
615 }
616 // If total bytes is 0, it's a queue ack and gets skipped.
617 Buffer* pBuffer = _blockStore.getBuffer();
618 pBuffer->setPosition(block->_offset +
619 sizeof(amps_uint32_t));
620 if (pBuffer->getUint32() == 0)
621 {
622 return false;
623 }
624 replayOnto(block, replayer_);
625 return true;
626 }
627 else // Get Store and Client back in sync
628 {
629 _message.reset();
630 leastIdx -= 1;
631 _message.setSequence(leastIdx);
632 replayer_.execute(_message);
633 return false;
634 }
635 }
636
642 size_t unpersistedCount() const
643 {
644 size_t count = (size_t)_stored;
645 return count;
646 }
647
656 virtual void flush(long timeout_)
657 {
658 BufferLock bufferGuard(_blockStore);
659 amps_uint64_t waitFor = _getHighestUnpersisted();
660 // Check that we aren't already empty
661 if (waitFor == getUnsetSequence())
662 {
663 return;
664 }
665 if (timeout_ > 0)
666 {
667 bool timedOut = false;
668 AMPS_START_TIMER(timeout_);
669 // While timeout hasn't expired and we haven't had everything acked
670 while (!timedOut && _stored != 0
671 && waitFor >= _getLowestUnpersisted())
672 {
673 if (!_blockStore.wait(timeout_))
674 {
675 // May have woken up early, check real time
676 AMPS_RESET_TIMER(timedOut, timeout_);
677 }
678 }
679 // If we timed out and still haven't caught up with the acks
680 if (timedOut && _stored != 0
681 && waitFor >= _getLowestUnpersisted())
682 {
683 throw TimedOutException("Timed out waiting to flush publish store.");
684 }
685 }
686 else
687 {
688 while (_stored != 0 && waitFor >= _getLowestUnpersisted())
689 {
690 // Still wake up every 1s so python can interrupt
691 _blockStore.wait(1000);
692 // Don't hold lock if possibly grabbing GIL
693 BufferUnlock unlck(_blockStore);
694 amps_invoke_waiting_function();
695 }
696 }
697 }
698
699 amps_uint64_t getLowestUnpersisted() const
700 {
701 BufferLock bufferGuard(_blockStore);
702 return _getLowestUnpersisted();
703 }
704
705 amps_uint64_t getHighestUnpersisted() const
706 {
707 BufferLock bufferGuard(_blockStore);
708 return _getHighestUnpersisted();
709 }
710
711 amps_uint64_t getLastPersisted(void)
712 {
713 BufferLock bufferGuard(_blockStore);
714 return _getLastPersisted();
715 }
716
717 protected:
718 static bool canResize(size_t requestedSize_, void* vpThis_)
719 {
720 BlockPublishStore* me = (BlockPublishStore*)vpThis_;
721 return me->callResizeHandler(requestedSize_);
722 }
723
724 amps_uint64_t _getLowestUnpersisted() const
725 {
726 // Assume the lock is held
727 // If we don't have anything, return MAX
728 if (!_blockStore.front())
729 {
730 return getUnsetSequence();
731 }
732 return _blockStore.front()->_sequence;
733 }
734
735 amps_uint64_t _getHighestUnpersisted() const
736 {
737 // Assume the lock is held
738 // If we don't have anything, return MAX
739 if (!_blockStore.back())
740 {
741 return getUnsetSequence();
742 }
743 return _blockStore.back()->_sequence;
744 }
745
746 amps_uint64_t _getLastPersisted(void)
747 {
748 // Assume the lock is held
749 amps_uint64_t lastPersisted = (amps_uint64_t)0;
750 Buffer* pBuffer = _blockStore.getBuffer();
751 pBuffer->setPosition(_metadataBlock->_offset + 8);
752 lastPersisted = pBuffer->getUint64();
753 if (lastPersisted)
754 {
755 if (_lastSequence < lastPersisted)
756 {
757 _lastSequence = lastPersisted;
758 }
759 return lastPersisted;
760 }
761 if (_maxDiscarded)
762 {
763 lastPersisted = _maxDiscarded;
764 }
765 else
766 {
767 #ifdef _WIN32
768 struct _timeb t;
769 _ftime_s(&t);
770 lastPersisted = (t.time * 1000 + t.millitm) * (amps_uint64_t)1000000;
771 #else // not _WIN32
772 struct timeval tv;
773 gettimeofday(&tv, NULL);
774 lastPersisted = (amps_uint64_t)((tv.tv_sec * 1000) + (tv.tv_usec / 1000))
775 * (amps_uint64_t)1000000;
776 #endif
777 }
778 if (_lastSequence > 2)
779 {
780 amps_uint64_t low = _getLowestUnpersisted();
781 amps_uint64_t high = _getHighestUnpersisted();
782 if (low != getUnsetSequence())
783 {
784 lastPersisted = low - 1;
785 }
786 if (high != getUnsetSequence() && _lastSequence <= high)
787 {
788 _lastSequence = high;
789 }
790 if (_lastSequence < lastPersisted)
791 {
792 lastPersisted = _lastSequence - 1;
793 }
794 }
795 else
796 {
797 _lastSequence = lastPersisted;
798 }
799 pBuffer->setPosition(_metadataBlock->_offset
800 + sizeof(amps_uint32_t) // blocks used
801 + sizeof(amps_uint32_t)); // record length
802 pBuffer->putUint64(lastPersisted);
803 _metadataBlock->_sequence = lastPersisted;
804 return lastPersisted;
805 }
806
807 void recover(void)
808 {
809 BufferLock bufferGuard(_blockStore);
810 // Make sure the size isn't 0 and is a multiple of block size
811 Buffer* pBuffer = _blockStore.getBuffer();
812 size_t size = pBuffer->getSize();
813 amps_uint32_t blockSize = getBlockSize();
814 if (size == 0)
815 {
816 _blockStore.init();
817 _metadataBlock = _blockStore.get(1);
818 _metadataBlock->_sequence = (amps_uint64_t)0;
819 pBuffer->setPosition(_metadataBlock->_offset);
820 // Metadata block holds block size, block header size,
821 // last discarded sequence, client version
822 pBuffer->putUint32(blockSize);
823 pBuffer->putUint32((amps_uint32_t)getBlockHeaderSize());
824 pBuffer->putUint64((amps_uint64_t)0);
825 // Metadata blocks puts client version in CRC position
826 pBuffer->putUint64((amps_uint64_t)VersionInfo::parseVersion(AMPS_CLIENT_VERSION));
827 // No next in chain
828 pBuffer->putUint64((amps_uint64_t)0);
829 return;
830 }
831 size_t numBlocks = size / blockSize;
832 if (size % blockSize > 0)
833 {
834 // We shouldn't ever be in here, since it requires starting with a
835 // file that is not an even multiple of block size and we always
836 // fix the size.
837 numBlocks = size / blockSize;
838 ++numBlocks;
839 amps_uint32_t blockCount = 0;
840 // We allocate all the Blocks at once below so delete allocated Block[]
841 delete[] _blockStore.resizeBuffer(numBlocks * blockSize, &blockCount);
842 // Resize can fail if resizeHandler is set and refuses the request
843 // Since this is recovery, we need to simply fail in that case
844 if (size > pBuffer->getSize() || numBlocks != (size_t)blockCount)
845 {
846 throw StoreException("Publish Store could not resize correctly during recovery, possibly due to resizeHandler refusing the request.");
847 }
848 size = pBuffer->getSize();
849 }
850
851 amps_uint64_t maxIdx = 0;
852 amps_uint64_t minIdx = 0;
853 size_t location = 0;
854 BlockHeader blockHeader;
855 // The blocks we create here all get their offset set in below loop
856 Block* blocks = new Block[numBlocks];
857 blocks[numBlocks - 1]._nextInList = 0;
858 size_t blockNum = 0;
859 _blockStore.addBlocks(blocks);
860 _metadataBlock = blocks; // The first Block is metadata
861 _metadataBlock->_nextInList = 0;
862 pBuffer->setPosition(0);
863 pBuffer->copyBytes((char*)&blockHeader, sizeof(BlockHeader));
864 /* Metadata Block header fields
865 * amps_uint32_t _blocksToWrite = BlockSize
866 * amps_uint32_t _totalRemaining = BlockHeaderSize
867 * amps_uint64_t _seq = last persisted sequence number
868 * amps_uint64_t _crcVal = unused
869 * amps_uint64_t _nextInChain = unused
870 */
871 if (blockHeader._blocksToWrite == 1) // Old store format?
872 {
873 /* Old format metadata block header fields
874 * amps_uint32_t _blocksToWrite = 1
875 * amps_uint32_t _totalRemaining = client version
876 * amps_uint64_t _seq = last persisted sequence number
877 * amps_uint64_t _crcVal = unused
878 * amps_uint64_t _nextInChain = unused
879 */
880 // Readable old format starts with version 5.0.0.0
881 if (blockHeader._totalRemaining >= 5000000)
882 {
883 // All recovery needs to be based on old format
884 // so go do that instead.
885 recoverOldFormat(blocks);
886 return;
887 }
888 // Unreadable format, fail
889 throw StoreException("Unrecognized format for Store. Can't recover.");
890 }
891 if (blockHeader._blocksToWrite == 0)
892 {
893 pBuffer->setPosition(0);
894 pBuffer->putUint32(blockSize);
895 }
896 else
897 {
898 blockSize = blockHeader._blocksToWrite;
899 _blockStore.setBlockSize(blockSize);
900 }
901 if (blockHeader._totalRemaining == 0)
902 {
903 pBuffer->setPosition(sizeof(amps_uint32_t));
904 pBuffer->putUint32((amps_uint32_t)getBlockHeaderSize());
905 }
906 else
907 {
908 _blockStore.setBlockHeaderSize(blockHeader._totalRemaining);
909 }
910 _metadataBlock->_sequence = blockHeader._seq;
911 if (_metadataBlock->_sequence
912 && _metadataBlock->_sequence < (amps_uint64_t)1000000)
913 {
914 pBuffer->setPosition(_metadataBlock->_offset
915 + sizeof(amps_uint32_t) // BlockSize
916 + sizeof(amps_uint32_t)); // BlockHeaderSize
917 pBuffer->putUint64((amps_uint64_t)0);
918 _metadataBlock->_sequence = 0;
919 }
920 else
921 {
922 // Set _maxDiscarded and _lastSequence
923 _maxDiscarded = _metadataBlock->_sequence;
924 _lastSequence = _maxDiscarded;
925 }
926 // This would be where to check the client version string
927 // No checks currently
928 location += blockSize;
929 amps_uint32_t freeCount = 0;
930 Block* firstFree = NULL;
931 Block* endOfFreeList = NULL;
932 // Used to create used list in order after recovery
933 typedef std::map<amps_uint64_t, Block*> RecoverMap;
934 RecoverMap recoveredBlocks;
935 while (location < size)
936 {
937 // Get index and check if non-zero
938 pBuffer->setPosition(location);
939 pBuffer->copyBytes((char*)&blockHeader, sizeof(BlockHeader));
940 if ((blockHeader._seq > 0 && blockHeader._totalRemaining < size) &&
941 (!blockHeader._crcVal || recoveredBlocks.count(blockHeader._seq)))
942 {
943 // Block is part of a chain
944 location += blockSize;
945 continue;
946 }
947 Block* block = blocks[++blockNum].setOffset(location);
948 bool recovered = false;
949 if (blockHeader._seq > 0 && blockHeader._totalRemaining < size)
950 {
951 blockHeader._totalRemaining -= (amps_uint32_t)getBlockChainHeaderSize();
952 block->_sequence = blockHeader._seq;
953 // Track min and max
954 if (maxIdx < blockHeader._seq)
955 {
956 maxIdx = blockHeader._seq;
957 }
958 if (minIdx > blockHeader._seq)
959 {
960 minIdx = blockHeader._seq;
961 }
962 // Save it in recovered blocks
963 recoveredBlocks[blockHeader._seq] = block;
964 // Set up the chain
965 while (blockHeader._nextInChain != (amps_uint64_t)0)
966 {
967 Block* chain = blocks[++blockNum]
968 .setOffset((size_t)blockHeader._nextInChain);
969 chain->_nextInList = 0;
970 pBuffer->setPosition((size_t)blockHeader._nextInChain
971 + sizeof(amps_uint32_t) // blocks used
972 + sizeof(amps_uint32_t) // record length
973 + sizeof(amps_uint64_t) // seq
974 + sizeof(amps_uint64_t)); // crc
975 blockHeader._nextInChain = pBuffer->getUint64();
976 block->_nextInChain = chain;
977 block = chain;
978 block->_sequence = blockHeader._seq;
979 }
980 recovered = true;
981 }
982 if (!recovered)
983 {
984 // Put this Block on the free list
985 if (endOfFreeList)
986 {
987 endOfFreeList->_nextInList = block;
988 }
989 else
990 {
991 firstFree = block;
992 }
993 endOfFreeList = block;
994 ++freeCount;
995 }
996 location += blockSize;
997 }
998 if (endOfFreeList)
999 {
1000 endOfFreeList->_nextInList = 0;
1001 }
1002 _blockStore.setFreeList(firstFree, freeCount);
1003 if (maxIdx > _lastSequence)
1004 {
1005 _lastSequence = maxIdx;
1006 }
1007 if (minIdx > _maxDiscarded + 1)
1008 {
1009 _maxDiscarded = minIdx - 1;
1010 }
1011 if (_maxDiscarded > _metadataBlock->_sequence)
1012 {
1013 _metadataBlock->_sequence = _maxDiscarded;
1014 pBuffer->setPosition(_metadataBlock->_offset + 8);
1015 pBuffer->putUint64(_maxDiscarded);
1016 }
1017 Block* end = NULL;
1018 AMPS_FETCH_ADD(&_stored, (long)(recoveredBlocks.size()));
1019 for (RecoverMap::iterator i = recoveredBlocks.begin();
1020 i != recoveredBlocks.end(); ++i)
1021 {
1022 if (end)
1023 {
1024 end->_nextInList = i->second;
1025 }
1026 else
1027 {
1028 _blockStore.setUsedList(i->second);
1029 }
1030 end = i->second;
1031 }
1032 if (end)
1033 {
1034 end->_nextInList = 0;
1035 }
1036 _blockStore.setEndOfUsedList(end);
1037 }
1038
1039 private:
1040 // Lock should already be held
1041 void replayOnto(Block* block_, StoreReplayer& replayer_)
1042 {
1043 // Read the header
1044 size_t start = block_->_offset;
1045 size_t position = start;
1046 Buffer* pBuffer = _blockStore.getBuffer();
1047 pBuffer->setPosition(position);
1048 BlockHeader blockHeader;
1049 pBuffer->copyBytes((char*)&blockHeader, sizeof(BlockHeader));
1050 if (blockHeader._totalRemaining == 0)
1051 {
1052 // Queue acking sow_delete
1053 return;
1054 }
1055 position += getBlockHeaderSize();
1056 BlockChainHeader blockChainHeader;
1057 pBuffer->copyBytes((char*)&blockChainHeader, sizeof(blockChainHeader));
1058 if (blockChainHeader._operation == Message::Command::Unknown)
1059 {
1060 // Queue acking sow_delete
1061 return;
1062 }
1063 blockChainHeader._ackTypes |= Message::AckType::Persisted;
1064 position += getBlockChainHeaderSize();
1065 blockHeader._totalRemaining -= (amps_uint32_t)getBlockChainHeaderSize();
1066 pBuffer->setPosition(position);
1067
1068 if (blockHeader._totalRemaining
1069 < blockChainHeader._commandIdLen
1070 + blockChainHeader._correlationIdLen
1071 + blockChainHeader._expirationLen
1072 + blockChainHeader._sowKeyLen
1073 + blockChainHeader._topicLen)
1074 {
1075 std::ostringstream os;
1076 os << "Corrupted message found with invalid lengths. "
1077 << "Attempting to replay " << block_->_sequence
1078 << ". Block sequence " << blockHeader._seq
1079 << ", topic length " << blockChainHeader._topicLen
1080 << ", data length " << blockHeader._totalRemaining
1081 << ", command ID length " << blockChainHeader._commandIdLen
1082 << ", correlation ID length " << blockChainHeader._correlationIdLen
1083 << ", expiration length " << blockChainHeader._expirationLen
1084 << ", sow key length " << blockChainHeader._sowKeyLen
1085 << ", start " << start
1086 << ", position " << position
1087 << ", buffer size " << pBuffer->getSize();
1088 throw StoreException(os.str());
1089 }
1090
1091 // Start prepping the message
1092 _message.reset();
1093 _message.setCommandEnum((Message::Command::Type)blockChainHeader._operation);
1094 _message.setAckTypeEnum((unsigned)blockChainHeader._ackTypes
1095 | Message::AckType::Persisted);
1096 _message.setSequence(blockHeader._seq);
1097 // Read the data and calculate the CRC
1098 Block* current = block_;
1099 size_t blockBytesRemaining = getBlockDataSize() - getBlockChainHeaderSize();
1100 amps_uint64_t crcCalc = (amps_uint64_t)0ULL;
1101 // Use tmpBuffers for any fields split across Block boundaries
1102 char** tmpBuffers = (blockHeader._blocksToWrite > 1) ? new char* [blockHeader._blocksToWrite - 1] : 0;
1103 size_t blockNum = 0;
1104 if (blockChainHeader._commandIdLen > 0)
1105 {
1106 if (blockChainHeader._commandIdLen <= blockBytesRemaining)
1107 {
1108 _message.assignCommandId(pBuffer->getBytes(blockChainHeader._commandIdLen)._data,
1109 blockChainHeader._commandIdLen);
1110 blockBytesRemaining -= blockChainHeader._commandIdLen;
1111 }
1112 else
1113 {
1114 tmpBuffers[blockNum] = new char[blockChainHeader._commandIdLen]; // -V522
1115 size_t totalLeft = blockChainHeader._commandIdLen;
1116 size_t totalRead = 0;
1117 size_t readLen = 0;
1118 while (totalLeft)
1119 {
1120 readLen = blockBytesRemaining < totalLeft ?
1121 blockBytesRemaining : totalLeft;
1122 pBuffer->copyBytes(tmpBuffers[blockNum] + totalRead, readLen);
1123 if (!(totalLeft -= readLen))
1124 {
1125 break;
1126 }
1127 if (!(current = current->_nextInChain))
1128 {
1129 break;
1130 }
1131 totalRead += readLen;
1132 blockBytesRemaining = getBlockDataSize();
1133 position = current->_offset + getBlockHeaderSize();
1134 pBuffer->setPosition(position);
1135 }
1136 blockBytesRemaining -= readLen;
1137 _message.assignCommandId(tmpBuffers[blockNum++], blockChainHeader._commandIdLen);
1138 }
1139 blockHeader._totalRemaining -= blockChainHeader._commandIdLen;
1140 crcCalc = _crc(_message.getCommandId().data(),
1141 blockChainHeader._commandIdLen, crcCalc);
1142 }
1143 if (blockChainHeader._correlationIdLen > 0)
1144 {
1145 if (blockChainHeader._correlationIdLen <= blockBytesRemaining)
1146 {
1147 _message.assignCorrelationId(
1148 pBuffer->getBytes(blockChainHeader._correlationIdLen)._data,
1149 blockChainHeader._correlationIdLen);
1150 blockBytesRemaining -= blockChainHeader._correlationIdLen;
1151 }
1152 else
1153 {
1154 tmpBuffers[blockNum] = new char[blockChainHeader._correlationIdLen]; // -V522
1155 size_t totalLeft = blockChainHeader._correlationIdLen;
1156 size_t totalRead = 0;
1157 size_t readLen = 0;
1158 while (totalLeft)
1159 {
1160 readLen = blockBytesRemaining < totalLeft ?
1161 blockBytesRemaining : totalLeft;
1162 pBuffer->copyBytes(tmpBuffers[blockNum] + totalRead, readLen);
1163 if (!(totalLeft -= readLen))
1164 {
1165 break;
1166 }
1167 if (!(current = current->_nextInChain)) // -V522
1168 {
1169 break;
1170 }
1171 totalRead += readLen;
1172 blockBytesRemaining = getBlockDataSize();
1173 position = current->_offset + getBlockHeaderSize();
1174 pBuffer->setPosition(position);
1175 }
1176 blockBytesRemaining -= readLen;
1177 _message.assignCorrelationId(tmpBuffers[blockNum++], blockChainHeader._correlationIdLen);
1178 }
1179 blockHeader._totalRemaining -= blockChainHeader._correlationIdLen;
1180 crcCalc = _crc(_message.getCorrelationId().data(),
1181 blockChainHeader._correlationIdLen, crcCalc);
1182 }
1183 if (blockChainHeader._expirationLen > 0)
1184 {
1185 if (blockChainHeader._expirationLen <= blockBytesRemaining)
1186 {
1187 _message.assignExpiration(
1188 pBuffer->getBytes(blockChainHeader._expirationLen)._data,
1189 blockChainHeader._expirationLen);
1190 blockBytesRemaining -= blockChainHeader._expirationLen;
1191 }
1192 else
1193 {
1194 tmpBuffers[blockNum] = new char[blockChainHeader._expirationLen]; // -V522
1195 size_t totalLeft = blockChainHeader._expirationLen;
1196 size_t totalRead = 0;
1197 size_t readLen = 0;
1198 while (totalLeft)
1199 {
1200 readLen = blockBytesRemaining < totalLeft ?
1201 blockBytesRemaining : totalLeft;
1202 pBuffer->copyBytes(tmpBuffers[blockNum] + totalRead, readLen);
1203 if (!(totalLeft -= readLen))
1204 {
1205 break;
1206 }
1207 if (!(current = current->_nextInChain))
1208 {
1209 break;
1210 }
1211 totalRead += readLen;
1212 blockBytesRemaining = getBlockDataSize();
1213 position = current->_offset + getBlockHeaderSize();
1214 pBuffer->setPosition(position);
1215 }
1216 blockBytesRemaining -= readLen;
1217 _message.assignExpiration(tmpBuffers[blockNum++], blockChainHeader._expirationLen);
1218 }
1219 blockHeader._totalRemaining -= blockChainHeader._expirationLen;
1220 crcCalc = _crc(_message.getExpiration().data(),
1221 blockChainHeader._expirationLen, crcCalc);
1222 }
1223 if (blockChainHeader._sowKeyLen > 0)
1224 {
1225 if (blockChainHeader._sowKeyLen <= blockBytesRemaining)
1226 {
1227 _message.assignSowKey(pBuffer->getBytes(blockChainHeader._sowKeyLen)._data,
1228 blockChainHeader._sowKeyLen);
1229 blockBytesRemaining -= blockChainHeader._sowKeyLen;
1230 }
1231 else
1232 {
1233 tmpBuffers[blockNum] = new char[blockChainHeader._sowKeyLen]; // -V522
1234 size_t totalLeft = blockChainHeader._sowKeyLen;
1235 size_t totalRead = 0;
1236 size_t readLen = 0;
1237 while (totalLeft)
1238 {
1239 readLen = blockBytesRemaining < totalLeft ?
1240 blockBytesRemaining : totalLeft;
1241 pBuffer->copyBytes(tmpBuffers[blockNum] + totalRead, readLen);
1242 if (!(totalLeft -= readLen))
1243 {
1244 break;
1245 }
1246 if (!(current = current->_nextInChain))
1247 {
1248 break;
1249 }
1250 totalRead += readLen;
1251 blockBytesRemaining = getBlockDataSize();
1252 position = current->_offset + getBlockHeaderSize();
1253 pBuffer->setPosition(position);
1254 }
1255 blockBytesRemaining -= readLen;
1256 _message.assignSowKey(tmpBuffers[blockNum++], blockChainHeader._sowKeyLen);
1257 }
1258 blockHeader._totalRemaining -= blockChainHeader._sowKeyLen;
1259 crcCalc = _crc(_message.getSowKey().data(), blockChainHeader._sowKeyLen, crcCalc);
1260 }
1261 if (blockChainHeader._topicLen > 0)
1262 {
1263 if (blockChainHeader._topicLen <= blockBytesRemaining)
1264 {
1265 _message.assignTopic(pBuffer->getBytes(blockChainHeader._topicLen)._data,
1266 blockChainHeader._topicLen);
1267 blockBytesRemaining -= blockChainHeader._topicLen;
1268 }
1269 else
1270 {
1271 tmpBuffers[blockNum] = new char[blockChainHeader._topicLen]; // -V522
1272 size_t totalLeft = blockChainHeader._topicLen;
1273 size_t totalRead = 0;
1274 size_t readLen = 0;
1275 while (totalLeft)
1276 {
1277 readLen = blockBytesRemaining < totalLeft ?
1278 blockBytesRemaining : totalLeft;
1279 pBuffer->copyBytes(tmpBuffers[blockNum] + totalRead, readLen);
1280 if (!(totalLeft -= readLen))
1281 {
1282 break;
1283 }
1284 if (!(current = current->_nextInChain))
1285 {
1286 break;
1287 }
1288 totalRead += readLen;
1289 blockBytesRemaining = getBlockDataSize();
1290 position = current->_offset + getBlockHeaderSize();
1291 pBuffer->setPosition(position);
1292 }
1293 blockBytesRemaining -= readLen;
1294 _message.assignTopic(tmpBuffers[blockNum++], blockChainHeader._topicLen);
1295 }
1296 blockHeader._totalRemaining -= blockChainHeader._topicLen;
1297 crcCalc = _crc(_message.getTopic().data(), blockChainHeader._topicLen, crcCalc);
1298 }
1299 if (blockHeader._totalRemaining > 0)
1300 {
1301 if (blockHeader._totalRemaining <= blockBytesRemaining)
1302 {
1303 if (blockChainHeader._flag == -1 || blockChainHeader._flag == SOW_DELETE_DATA)
1304 {
1305 _message.assignData(
1306 pBuffer->getBytes(blockHeader._totalRemaining)._data,
1307 blockHeader._totalRemaining);
1308 crcCalc = _crc(_message.getData().data(),
1309 blockHeader._totalRemaining, crcCalc);
1310 }
1311 else if (blockChainHeader._flag == SOW_DELETE_FILTER)
1312 {
1313 _message.assignFilter(
1314 pBuffer->getBytes(blockHeader._totalRemaining)._data,
1315 blockHeader._totalRemaining);
1316 crcCalc = _crc(_message.getFilter().data(),
1317 blockHeader._totalRemaining, crcCalc);
1318 }
1319 else if (blockChainHeader._flag == SOW_DELETE_KEYS)
1320 {
1321 _message.assignSowKeys(
1322 pBuffer->getBytes(blockHeader._totalRemaining)._data,
1323 blockHeader._totalRemaining);
1324 crcCalc = _crc(_message.getSowKeys().data(),
1325 blockHeader._totalRemaining, crcCalc);
1326 }
1327 else if (blockChainHeader._flag == SOW_DELETE_BOOKMARK)
1328 {
1329 _message.assignBookmark(
1330 pBuffer->getBytes(blockHeader._totalRemaining)._data,
1331 blockHeader._totalRemaining);
1332 crcCalc = _crc(_message.getBookmark().data(),
1333 blockHeader._totalRemaining, crcCalc);
1334 }
1335 else if (blockChainHeader._flag == SOW_DELETE_BOOKMARK_CANCEL)
1336 {
1337 _message.assignBookmark(
1338 pBuffer->getBytes(blockHeader._totalRemaining)._data,
1339 blockHeader._totalRemaining);
1340 crcCalc = _crc(_message.getBookmark().data(),
1341 blockHeader._totalRemaining, crcCalc);
1342 _message.assignOptions(AMPS_OPTIONS_CANCEL, 6);
1343 }
1344 }
1345 else
1346 {
1347 tmpBuffers[blockNum] = new char[blockHeader._totalRemaining]; // -V522
1348 size_t totalLeft = blockHeader._totalRemaining;
1349 size_t totalRead = 0;
1350 size_t readLen = 0;
1351 while (totalLeft)
1352 {
1353 readLen = blockBytesRemaining < totalLeft ?
1354 blockBytesRemaining : totalLeft;
1355 pBuffer->copyBytes(tmpBuffers[blockNum] + totalRead, readLen);
1356 if (!(totalLeft -= readLen))
1357 {
1358 break;
1359 }
1360 if (!(current = current->_nextInChain))
1361 {
1362 break;
1363 }
1364 totalRead += readLen;
1365 blockBytesRemaining = getBlockDataSize();
1366 position = current->_offset + getBlockHeaderSize();
1367 pBuffer->setPosition(position);
1368 }
1369 position += readLen;
1370 if (blockChainHeader._flag == -1 || blockChainHeader._flag == SOW_DELETE_DATA)
1371 {
1372 _message.assignData(tmpBuffers[blockNum], blockHeader._totalRemaining);
1373 }
1374 else if (blockChainHeader._flag == SOW_DELETE_FILTER)
1375 {
1376 _message.assignFilter(tmpBuffers[blockNum], blockHeader._totalRemaining);
1377 }
1378 else if (blockChainHeader._flag == SOW_DELETE_KEYS)
1379 {
1380 _message.assignSowKeys(tmpBuffers[blockNum], blockHeader._totalRemaining);
1381 }
1382 else if (blockChainHeader._flag == SOW_DELETE_BOOKMARK)
1383 {
1384 _message.assignBookmark(tmpBuffers[blockNum], blockHeader._totalRemaining);
1385 }
1386 else if (blockChainHeader._flag == SOW_DELETE_BOOKMARK_CANCEL)
1387 {
1388 _message.assignBookmark(tmpBuffers[blockNum], blockHeader._totalRemaining);
1389 _message.assignOptions(AMPS_OPTIONS_CANCEL, 6);
1390 }
1391 crcCalc = _crc(tmpBuffers[blockNum++], blockHeader._totalRemaining, crcCalc); // -V595
1392 }
1393 }
1394
1395 // Validate the crc and seq
1396 if (crcCalc != blockHeader._crcVal || blockHeader._seq != block_->_sequence)
1397 {
1398 std::ostringstream os;
1399 os << "Corrupted message found by CRC or sequence "
1400 << "Attempting to replay " << block_->_sequence
1401 << ". Block sequence " << blockHeader._seq
1402 << ", expiration length " << blockChainHeader._expirationLen
1403 << ", sowKey length " << blockChainHeader._sowKeyLen
1404 << ", topic length " << blockChainHeader._topicLen
1405 << ", data length " << blockHeader._totalRemaining
1406 << ", command ID length " << blockChainHeader._commandIdLen
1407 << ", correlation ID length " << blockChainHeader._correlationIdLen
1408 << ", flag " << blockChainHeader._flag
1409 << ", expected CRC " << blockHeader._crcVal
1410 << ", actual CRC " << crcCalc
1411 << ", start " << start
1412 << ", position " << position
1413 << ", buffer size " << pBuffer->getSize();
1414 for (Block* block = block_; block; block = block->_nextInChain)
1415 {
1416 os << "\n BLOCK " << block->_offset;
1417 }
1418 if (tmpBuffers)
1419 {
1420 for (amps_uint32_t i = 0; i < blockNum; ++i)
1421 {
1422 delete[] tmpBuffers[i]; // -V522
1423 }
1424 delete[] tmpBuffers;
1425 }
1426 throw StoreException(os.str());
1427 }
1428 // Replay the message
1429 replayer_.execute(_message);
1430 // Free the buffer if allocated
1431 if (tmpBuffers)
1432 {
1433 for (amps_uint32_t i = 0; i < blockNum; ++i)
1434 {
1435 delete[] tmpBuffers[i]; // -V522
1436 }
1437 delete[] tmpBuffers;
1438 }
1439 }
1440
1441 // Lock should already be held
1442 // Read an older format file and update it.
1443 void recoverOldFormat(Block* blocks)
1444 {
1445 Buffer* pBuffer = _blockStore.getBuffer();
1446 amps_uint64_t maxIdx = 0;
1447 amps_uint64_t minIdx = 0;
1448 size_t size = pBuffer->getSize();
1449 size_t location = 0;
1450 pBuffer->setPosition(location);
1451 pBuffer->putUint32((amps_uint32_t)getBlockSize());
1452 pBuffer->putUint32((amps_uint32_t)_blockStore.getBlockHeaderSize());
1453 _metadataBlock->_sequence = pBuffer->getUint64();
1454 if (_metadataBlock->_sequence < (amps_uint64_t)1000000)
1455 {
1456 pBuffer->setPosition(_metadataBlock->_offset + 8);
1457 pBuffer->putUint64((amps_uint64_t)0);
1458 _metadataBlock->_sequence = 0;
1459 }
1460 else
1461 {
1462 // Set _maxDiscarded and _lastSequence
1463 _maxDiscarded = _metadataBlock->_sequence;
1464 _lastSequence = _maxDiscarded;
1465 }
1466 // Write the current client version
1467 pBuffer->putUint64((amps_uint64_t)VersionInfo::parseVersion(AMPS_CLIENT_VERSION));
1468 // No next in chain
1469 pBuffer->putUint64((amps_uint64_t)0);
1470 // No checks currently
1471 location += getBlockSize();
1472 amps_uint32_t freeCount = 0;
1473 Block* firstFree = NULL;
1474 Block* endOfFreeList = NULL;
1475 amps_uint32_t blockSize = getBlockSize();
1476 size_t numBlocks = size / blockSize;
1477 size_t blockNum = 0;
1478 // Used to create used list in order after recovery
1479 typedef std::map<amps_uint64_t, Block*> RecoverMap;
1480 RecoverMap recoveredBlocks;
1481 RecoverMap growingBlocks;
1482 amps_uint32_t growthBlocksNeeded = 0;
1483 while (location < size)
1484 {
1485 // Get seq and check if non-zero
1486 pBuffer->setPosition(location);
1487 BlockHeader blockHeader;
1488 pBuffer->copyBytes((char*)&blockHeader, sizeof(BlockHeader));
1489 size_t blockCount = (size_t)blockHeader._blocksToWrite;
1490 if (blockHeader._totalRemaining > 0 && blockHeader._seq > 0
1491 && blockHeader._totalRemaining < size
1492 && blockHeader._blocksToWrite < numBlocks
1493 && (blockHeader._blocksToWrite * blockSize)
1494 >= blockHeader._totalRemaining)
1495 {
1496 size_t oldFormatSize = blockHeader._totalRemaining;
1497 // Old format total was storage bytes plus 64 bytes for block
1498 // and chain headers.
1499 blockHeader._totalRemaining -= 64;
1500 // New format counts only chain header size
1501 blockHeader._totalRemaining += getBlockChainHeaderSize();
1502 // Get the rest of the header
1503 BlockChainHeader chainHeader;
1504 // Need to reset location to after OLD header:
1505 // amps_uint32_t blocks, amps_uint32_t totalRemaining,
1506 // amps_uint64_t seq, amps_uint64_t crc
1507 pBuffer->setPosition(location + (sizeof(amps_uint32_t) * 2)
1508 + (sizeof(amps_uint64_t) * 2) );
1509 // Read old chain header which uses same order, but not
1510 // as many bytes (everything is 32bit):
1511 // operation, commandIdLen, correlationIdLen,
1512 // expirationLen, sowKeyLen, topicLen, flag, ackTypes
1513 pBuffer->copyBytes((char*)&chainHeader,
1514 sizeof(amps_uint32_t) * 8);
1515 // Check for garbage, likely indicating this is part of a chain
1516 if ((chainHeader._commandIdLen + chainHeader._correlationIdLen
1517 + chainHeader._expirationLen + chainHeader._sowKeyLen
1518 + chainHeader._topicLen) > blockHeader._totalRemaining)
1519 {
1520 // Skip this block, can't be real data
1521 location += getBlockSize();
1522 continue;
1523 }
1524 // Check if data fits in current number of blocks
1525 amps_uint32_t blocksNeeded = (blockHeader._totalRemaining
1526 / getBlockDataSize())
1527 + (blockHeader._totalRemaining
1528 % getBlockDataSize()
1529 ? 1 : 0);
1530 if (blocksNeeded == blockHeader._blocksToWrite)
1531 {
1532 Block* first = blocks[++blockNum].setOffset(location);
1533 first->_nextInList = 0;
1534 first->_sequence = blockHeader._seq;
1535 if (blockHeader._blocksToWrite > 1)
1536 {
1537 // CRC is only set on the first block
1538 amps_uint64_t crcVal = blockHeader._crcVal;
1539 blockHeader._crcVal = 0;
1540 Block* current = 0;
1541 // It fits, just need to adjust the block formats
1542 // and set up the chain. Start with the last block
1543 // and move data as needed starting at the end.
1544 size_t currentBlockNum = blockNum
1545 + blockHeader._blocksToWrite
1546 - 1;
1547 // Last item could wrap to beginning, but beginning is
1548 // block 1, not 0, which is the metadata block.
1549 if (currentBlockNum >= numBlocks)
1550 {
1551 currentBlockNum = currentBlockNum - numBlocks + 1;
1552 }
1553 if (currentBlockNum < blockNum)
1554 {
1555 Block* last = blocks[currentBlockNum]
1556 .init(currentBlockNum, getBlockSize());
1557 if ((current = firstFree) == last)
1558 {
1559 firstFree = firstFree->_nextInList; // -V522
1560 if (!firstFree)
1561 {
1562 endOfFreeList = 0;
1563 }
1564 --freeCount;
1565 }
1566 else
1567 {
1568 while (current)
1569 {
1570 if (current->_nextInList == last)
1571 {
1572 current->_nextInList = last->_nextInList;
1573 current = last;
1574 --freeCount;
1575 break;
1576 }
1577 current = current->_nextInList;
1578 }
1579 }
1580 }
1581 if (!current)
1582 {
1583 current = blocks[currentBlockNum]
1584 .init(currentBlockNum, getBlockSize());
1585 }
1586 // Initially, the number of bytes in last block
1587 size_t dataBytes = oldFormatSize % getBlockSize();
1588 while (current != first)
1589 {
1590 current->_nextInList = 0;
1591 current->_sequence = blockHeader._seq;
1592 // Set _nextInChain on previous Block, will include first
1593 if (--currentBlockNum < 1
1594 || currentBlockNum > numBlocks)
1595 {
1596 currentBlockNum = numBlocks - 1;
1597 }
1598 Block* previous = blocks[currentBlockNum]
1599 .init(currentBlockNum,
1600 getBlockSize());
1601 previous->_nextInChain = current;
1602 // Shift to make room for a header in every block
1603 // Not growing, so this won't write past the end.
1604 // Shift amount accounts for a header added to each
1605 // block after the first plus any change in the
1606 // chain header size from 32, which is the old size.
1607 size_t bytesToMove = --blockCount
1608 * getBlockHeaderSize()
1609 + (getBlockChainHeaderSize()
1610 - 32);
1611 pBuffer->copyBytes(current->_offset + bytesToMove,
1612 current->_offset,
1613 dataBytes);
1614 dataBytes = getBlockSize();
1615 if (bytesToMove > getBlockHeaderSize())
1616 {
1617 bytesToMove -= getBlockHeaderSize();
1618 dataBytes -= bytesToMove;
1619 pBuffer->copyBytes(current->_offset
1620 + getBlockHeaderSize(),
1621 previous->_offset
1622 + dataBytes,
1623 bytesToMove);
1624 }
1625 // Set next in chain for this block's header
1626 blockHeader._nextInChain = (current->_nextInChain
1627 ? current->_nextInChain->_offset
1628 : (amps_uint64_t)0);
1629 // Write the header for this block
1630 pBuffer->setPosition(current->_offset);
1631 pBuffer->putBytes((const char*)&blockHeader,
1632 sizeof(BlockHeader));
1633 if (firstFree == previous)
1634 {
1635 firstFree = firstFree->_nextInList;
1636 if (!firstFree)
1637 {
1638 endOfFreeList = 0;
1639 }
1640 --freeCount;
1641 }
1642 else
1643 {
1644 current = firstFree;
1645 while (current)
1646 {
1647 if (current->_nextInList == previous)
1648 {
1649 current->_nextInList = previous->_nextInList;
1650 --freeCount;
1651 break;
1652 }
1653 current = current->_nextInList;
1654 }
1655 }
1656 current = previous;
1657 }
1658 blockNum += blockHeader._blocksToWrite - 1;
1659 blockHeader._crcVal = crcVal;
1660 }
1661 // Move bytes for chain header expansion from 32 bytes
1662 size_t bytesToMove = getBlockDataSize() - 32
1663 - (getBlockChainHeaderSize() - 32);
1664 pBuffer->copyBytes(first->_offset + getBlockHeaderSize()
1665 + getBlockChainHeaderSize(),
1666 first->_offset + getBlockHeaderSize() + 32,
1667 bytesToMove);
1668 // Rewrite the header and chain header for first Block.
1669 pBuffer->setPosition(first->_offset);
1670 blockHeader._nextInChain = (first->_nextInChain
1671 ? first->_nextInChain->_offset
1672 : (amps_uint64_t)0);
1673 pBuffer->putBytes((const char*)&blockHeader,
1674 sizeof(BlockHeader));
1675 pBuffer->putBytes((const char*)&chainHeader,
1676 sizeof(BlockChainHeader));
1677 // Add first Block to recovered for building the used
1678 // list later
1679 recoveredBlocks[blockHeader._seq] = first;
1680 }
1681 else
1682 {
1683 // This will need at least one more Block due to a header in
1684 // every Block. Check how many and save for later.
1685 growingBlocks[blockHeader._seq] = blocks[++blockNum].setOffset(location);
1686 growthBlocksNeeded += (blocksNeeded - blockHeader._blocksToWrite);
1687 blockNum += blockHeader._blocksToWrite - 1;
1688 }
1689 // Track min and max
1690 if (maxIdx < blockHeader._seq)
1691 {
1692 maxIdx = blockHeader._seq;
1693 }
1694 if (minIdx > blockHeader._seq)
1695 {
1696 minIdx = blockHeader._seq;
1697 }
1698 // Advance past read blocks
1699 location += blockHeader._blocksToWrite * getBlockSize();
1700 // Either we're exiting loop, or blockNum is in range
1701 assert(location >= size || blockNum < numBlocks);
1702 }
1703 else
1704 {
1705 // Put this Block on the free list
1706 Block* block = blocks[++blockNum].setOffset(location);
1707 if (endOfFreeList)
1708 {
1709 endOfFreeList->_nextInList = block;
1710 }
1711 else
1712 {
1713 firstFree = block;
1714 }
1715 endOfFreeList = block;
1716 ++freeCount;
1717 location += blockSize;
1718 }
1719 }
1720 for (RecoverMap::iterator i = growingBlocks.begin();
1721 i != growingBlocks.end(); ++i)
1722 {
1723 Block* first = i->second;
1724 pBuffer->setPosition(first->_offset);
1725 BlockHeader blockHeader;
1726 // Read an old BlockHeader, which is only 24 bytes.
1727 // The bytes match current BlockHeader, and _nextInChain is 0.
1728 pBuffer->copyBytes((char*)&blockHeader, 24);
1729 // Old format total was storage bytes plus 64 bytes for block
1730 // and chain headers.
1731 blockHeader._totalRemaining -= 64;
1732 // New format counts only chain header size
1733 blockHeader._totalRemaining += getBlockChainHeaderSize();
1734 if (freeCount < growthBlocksNeeded)
1735 {
1736 // We have to resize, let's try to do it once.
1737 amps_uint32_t minBlocksRequired = growthBlocksNeeded - freeCount;
1738 amps_uint32_t growthBlocks = _blockStore.getDefaultResizeBlocks();
1739 if (growthBlocks < minBlocksRequired)
1740 {
1741 amps_uint32_t defaultBlocks = _blockStore.getDefaultResizeBlocks();
1742 if (minBlocksRequired % defaultBlocks)
1743 minBlocksRequired = (minBlocksRequired / defaultBlocks + 1)
1744 * defaultBlocks;
1745 growthBlocks = minBlocksRequired;
1746 }
1747 amps_uint32_t newBlocks = 0;
1748 Block* addedBlocks = _blockStore.resizeBuffer(
1749 pBuffer->getSize()
1750 + growthBlocks * blockSize,
1751 &newBlocks);
1752 if (!addedBlocks)
1753 {
1754 throw StoreException("Failed to grow store buffer during recovery");
1755 }
1756 _blockStore.addBlocks(addedBlocks);
1757 freeCount += newBlocks;
1758 growthBlocksNeeded = (growthBlocksNeeded > freeCount)
1759 ? growthBlocksNeeded - freeCount : 0;
1760 if (endOfFreeList)
1761 {
1762 endOfFreeList->_nextInList = addedBlocks;
1763 }
1764 else
1765 {
1766 firstFree = addedBlocks;
1767 }
1768 endOfFreeList = &(addedBlocks[newBlocks - 1]);
1769 endOfFreeList->_nextInList = 0;
1770 }
1771 expandBlocks(blocks, first->_offset, first, blockHeader,
1772 &firstFree, &freeCount, pBuffer);
1773 // Add first Block to recovered for building the used list later
1774 recoveredBlocks[blockHeader._seq] = first;
1775 if (!firstFree)
1776 {
1777 endOfFreeList = 0;
1778 }
1779 }
1780 if (endOfFreeList)
1781 {
1782 endOfFreeList->_nextInList = 0;
1783 }
1784 _blockStore.setFreeList(firstFree, freeCount);
1785 if (maxIdx > _lastSequence)
1786 {
1787 _lastSequence = maxIdx;
1788 }
1789 if (minIdx > _maxDiscarded + 1)
1790 {
1791 _maxDiscarded = minIdx - 1;
1792 }
1793 if (_maxDiscarded > _metadataBlock->_sequence)
1794 {
1795 _metadataBlock->_sequence = _maxDiscarded;
1796 pBuffer->setPosition(_metadataBlock->_offset + 8);
1797 pBuffer->putUint64(_maxDiscarded);
1798 }
1799 Block* end = NULL;
1800 AMPS_FETCH_ADD(&_stored, (long)(recoveredBlocks.size()));
1801 for (RecoverMap::iterator i = recoveredBlocks.begin();
1802 i != recoveredBlocks.end(); ++i)
1803 {
1804 if (_blockStore.front())
1805 {
1806 end->_nextInList = i->second; // -V522
1807 }
1808 else
1809 {
1810 _blockStore.setUsedList(i->second);
1811 }
1812 end = i->second;
1813 }
1814 if (end)
1815 {
1816 end->_nextInList = 0;
1817 }
1818 _blockStore.setEndOfUsedList(end);
1819 }
1820
1821 // For recovering an old format store to current format when more Blocks
1822 // are needed with the new format.
1823 void expandBlocks(Block* blocks_, size_t location_, Block* first_,
1824 BlockHeader blockHeader_,
1825 Block** pFreeList_, amps_uint32_t* pFreeCount_,
1826 Buffer* pBuffer_)
1827 {
1828 // First create the chain, then we'll fill in reverse
1829 Block* current = first_;
1830 // Old format total was storage bytes plus 64 bytes for block
1831 // and chain headers.
1832 amps_uint32_t oldTotalRemaining = blockHeader_._totalRemaining;
1833 blockHeader_._totalRemaining -= 64;
1834 // New format counts only chain header size
1835 blockHeader_._totalRemaining += getBlockChainHeaderSize();
1836 // Check how many Blocks needed and if we have enough free.
1837 amps_uint32_t blocksNeeded = blockHeader_._totalRemaining
1838 / getBlockDataSize()
1839 + (blockHeader_._totalRemaining
1840 % getBlockDataSize()
1841 ? 1 : 0);
1842 // Last data block size, remove bytes saved in first block
1843 // then mod by block size.
1844 const amps_uint32_t blockSize = getBlockSize();
1845 // Old total remaining had all header included
1846 size_t endBlockSize = oldTotalRemaining % blockSize;
1847 if (!endBlockSize)
1848 {
1849 endBlockSize = blockSize;
1850 }
1851 size_t endOfData = 0;
1852 // Hang on to CRC until first block is written
1853 amps_uint64_t crcVal = blockHeader_._crcVal;
1854 blockHeader_._crcVal = 0;
1855
1856 std::stack<Block*> blocksUsed;
1857 for (amps_uint32_t i = 1; i < blocksNeeded; ++i)
1858 {
1859 blocksUsed.push(current);
1860 current->_sequence = blockHeader_._seq;
1861 if (i >= blockHeader_._blocksToWrite)
1862 {
1863 if (i == blockHeader_._blocksToWrite)
1864 {
1865 endOfData = current->_offset + endBlockSize;
1866 }
1867 current->_nextInChain = *pFreeList_;
1868 --(*pFreeCount_);
1869 *pFreeList_ = (*pFreeList_)->_nextInList;
1870 }
1871 else
1872 {
1873 current->_nextInChain = current->_nextInList;
1874 if (current->_nextInChain)
1875 {
1876 if (current->_offset + blockSize < pBuffer_->getSize())
1877 {
1878 current->_nextInChain->setOffset(current->_offset
1879 + blockSize);
1880 }
1881 else
1882 {
1883 current->_nextInChain->setOffset(blockSize);
1884 }
1885 }
1886 else
1887 {
1888 current->_nextInChain = blocks_[1].init(1, blockSize);
1889 }
1890 if (current->_nextInChain == *pFreeList_)
1891 {
1892 *pFreeList_ = (*pFreeList_)->_nextInList;
1893 --(*pFreeCount_);
1894 }
1895 else
1896 {
1897 for (Block* free = *pFreeList_; free;
1898 free = free->_nextInList)
1899 {
1900 if (free->_nextInList == current->_nextInChain)
1901 {
1902 free->_nextInList = free->_nextInList->_nextInList;
1903 --(*pFreeCount_);
1904 break;
1905 }
1906 }
1907 }
1908 }
1909 current->_nextInList = 0;
1910 current = current->_nextInChain;
1911 }
1912 // Make sure we write the correct number of blocks to write
1913 blockHeader_._blocksToWrite = blocksNeeded;
1914 // Finish setting up current
1915 current->_nextInList = 0;
1916 current->_sequence = blockHeader_._seq;
1917 // Now shift data, starting at the last Block
1918 // The total shift is for number of Blocks beyond the first
1919 // times Block header size, since previous format only wrote
1920 // the header in the first Block and had contiguous data,
1921 // with only wrap from end to beginning of buffer possible.
1922
1923 // First time through, this is bytes in last block. After,
1924 // it will be block data size.
1925 size_t dataBytes = blockHeader_._totalRemaining % getBlockDataSize();
1926 while (current != first_)
1927 {
1928 size_t chunkBytesAvail = endOfData > location_
1929 ? endOfData - location_
1930 : endOfData - 2048;
1931 if (chunkBytesAvail < dataBytes)
1932 {
1933 // Original was wrapped from end to start of buffer
1934 // Need to copy what's left at start to end of Block,
1935 // then start working from the end.
1936 // This can ONLY occur during wrap because the first
1937 // Block doesn't get moved in this loop.
1938 pBuffer_->copyBytes(current->_offset
1939 + getBlockSize()
1940 - chunkBytesAvail,
1941 getBlockSize(),
1942 chunkBytesAvail);
1943 chunkBytesAvail = dataBytes - chunkBytesAvail;
1944 endOfData = pBuffer_->getSize() - chunkBytesAvail;
1945 pBuffer_->copyBytes(current->_offset + getBlockHeaderSize(),
1946 endOfData,
1947 chunkBytesAvail);
1948 }
1949 else
1950 {
1951 endOfData -= dataBytes;
1952 pBuffer_->copyBytes(current->_offset + getBlockHeaderSize(),
1953 endOfData,
1954 dataBytes);
1955 }
1956 // Set next in chain in block header
1957 blockHeader_._nextInChain = (current->_nextInChain
1958 ? current->_nextInChain->_offset
1959 : (amps_uint64_t)0);
1960 // Write the header for this block
1961 pBuffer_->setPosition(current->_offset);
1962 pBuffer_->putBytes((const char*)&blockHeader_, sizeof(BlockHeader));
1963 current = blocksUsed.top();
1964 blocksUsed.pop();
1965 dataBytes = getBlockDataSize();
1966 }
1967 // Move bytes for chain header expansion from 32 bytes
1968 pBuffer_->copyBytes(first_->_offset
1969 + getBlockHeaderSize()
1970 + getBlockChainHeaderSize(),
1971 first_->_offset + getBlockHeaderSize() + 32,
1972 getBlockDataSize() - getBlockChainHeaderSize());
1973 // Set the CRC to indicate first block and set nextInChain
1974 blockHeader_._crcVal = crcVal;
1975 blockHeader_._nextInChain = first_->_nextInChain->_offset;
1976 // Need to reset location to after OLD header:
1977 // amps_uint32_t blocks, amps_uint32_t totalRemaining,
1978 // amps_uint64_t seq, amps_uint64_t crc
1979 pBuffer_->setPosition(location_ + (sizeof(amps_uint32_t) * 2)
1980 + (sizeof(amps_uint64_t) * 2) );
1981 // Read old chain header which uses same order, but not
1982 // as many bytes (everything is 32bit):
1983 // operation, commandIdLen, correlationIdLen,
1984 // expirationLen, sowKeyLen, topicLen, flag, ackTypes
1985 BlockChainHeader chainHeader;
1986 pBuffer_->copyBytes((char*)&chainHeader,
1987 sizeof(amps_uint32_t) * 8);
1988 // Rewrite the header and chain header for first Block.
1989 pBuffer_->setPosition(location_);
1990 pBuffer_->putBytes((const char*)&blockHeader_, sizeof(BlockHeader));
1991 pBuffer_->putBytes((const char*)&chainHeader, sizeof(BlockChainHeader));
1992 }
1993
1994 void chooseCRC(bool isFile)
1995 {
1996 if (!isFile)
1997 {
1998 _crc = noOpCRC;
1999 return;
2000 }
2001
2002 #ifndef AMPS_SSE_42
2003 _crc = AMPS::CRC<0>::crcNoSSE;
2004 #else
2005 if (AMPS::CRC<0>::isSSE42Enabled())
2006 {
2007 _crc = AMPS::CRC<0>::crc;
2008 }
2009 else
2010 {
2011 _crc = AMPS::CRC<0>::crcNoSSE;
2012 }
2013 #endif
2014 }
2015
2016 static amps_uint64_t noOpCRC(const char*, size_t, amps_uint64_t)
2017 {
2018 return 0;
2019 }
2020
2021 protected:
2022 mutable BlockStore _blockStore;
2023 private:
2024 // Block used to hold metadata, currently:
2025 // the last persisted
2026 Block* _metadataBlock;
2027 // Highest sequence that has been discarded
2028 amps_uint64_t _maxDiscarded;
2029 // Track the assigned sequence numbers
2030 #if __cplusplus >= 201103L || _MSC_VER >= 1900
2031 std::atomic<amps_uint64_t> _lastSequence;
2032 #else
2033 volatile amps_uint64_t _lastSequence;
2034 #endif
2035 // Track how many messages are stored
2036 AMPS_ATOMIC_TYPE _stored;
2037
2038 // Message used for doing replay
2039 Message _message;
2040
2041 typedef amps_uint64_t (*CRCFunction)(const char*, size_t, amps_uint64_t);
2042
2043 // Function used to calculate the CRC if one is used
2044 CRCFunction _crc;
2045
2046 };
2047
2048 }
2049
2050 #endif
2051
BlockStore.hpp
Provides AMPS::BlockStore, a class for storing Blocks of a fixed size into a Buffer implementation.
Buffer.hpp
Provides AMPS::Buffer, an abstract base class used by the store implementations in the AMPS client.
amps_message_get_field_uint64
AMPSDLL amps_uint64_t amps_message_get_field_uint64(amps_handle message, FieldId field)
Gets the unsigned 64-bit int value of a header field in an AMPS message.
ampsplusplus.hpp
Core type, function, and class declarations for the AMPS C++ client.
AMPS::AMPSException
Base class for all exceptions in AMPS.
Definition: AMPSException.hpp:41
AMPS::BlockPublishStore
Used as a base class for other stores in the AMPS C++ client, this is an implementation of StoreImpl ...
Definition: BlockPublishStore.hpp:61
AMPS::BlockPublishStore::getBlockDataSize
amps_uint32_t getBlockDataSize()
Return the size left in a block for data when it has a header in it.
Definition: BlockPublishStore.hpp:179
AMPS::BlockPublishStore::discardUpTo
virtual void discardUpTo(amps_uint64_t index_)
Remove all messages with an index up to and including index_.
Definition: BlockPublishStore.hpp:498
AMPS::BlockPublishStore::getBlockChainHeaderSize
static amps_uint32_t getBlockChainHeaderSize()
Block chain header is operation, command id length, correlation id length, expiration length,...
Definition: BlockPublishStore.hpp:163
AMPS::BlockPublishStore::BlockPublishStore
BlockPublishStore(Buffer *buffer_, amps_uint32_t blocksPerRealloc_=1000, bool isFile_=false, bool errorOnPublishGap_=false, amps_uint32_t blockSize_=DEFAULT_BLOCK_SIZE)
Create a BlockPublishStore using buffer_, that grows by blocksPerRealloc_ blocks when it must grow.
Definition: BlockPublishStore.hpp:199
AMPS::BlockPublishStore::replay
void replay(StoreReplayer &replayer_)
Replay all messages in the Store onto the given StoreReplayer.
Definition: BlockPublishStore.hpp:561
AMPS::BlockPublishStore::getLowestUnpersisted
amps_uint64_t getLowestUnpersisted() const
Get the oldest unpersisted message sequence in the store.
Definition: BlockPublishStore.hpp:699
AMPS::BlockPublishStore::unpersistedCount
size_t unpersistedCount() const
Method to return the count of messages that currently in the Store because they have not been discard...
Definition: BlockPublishStore.hpp:642
AMPS::BlockPublishStore::flush
virtual void flush(long timeout_)
Method to wait for the Store to discard everything that has been stored up to the point in time when ...
Definition: BlockPublishStore.hpp:656
AMPS::BlockPublishStore::replaySingle
bool replaySingle(StoreReplayer &replayer_, amps_uint64_t index_)
Replay one message in the Store onto the given StoreReplayer.
Definition: BlockPublishStore.hpp:593
AMPS::BlockPublishStore::getBlockHeaderSize
static amps_uint32_t getBlockHeaderSize()
Block header is number of blocks, total length, sequence number, crc, next in chain offset.
Definition: BlockPublishStore.hpp:153
AMPS::BlockPublishStore::store
amps_uint64_t store(const Message &message_, bool assignSequence_)
Store a given message that will be delivered to AMPS.
Definition: BlockPublishStore.hpp:266
AMPS::BlockPublishStore::Constants
Constants
Default constant values for BlockPublishStore.
Definition: BlockPublishStore.hpp:80
AMPS::BlockPublishStore::getBlockSize
amps_uint32_t getBlockSize()
Return the size left in a block for data when it has a header in it.
Definition: BlockPublishStore.hpp:171
AMPS::BlockPublishStore::getLastPersisted
amps_uint64_t getLastPersisted(void)
Get the last persisted sequence number.
Definition: BlockPublishStore.hpp:711
AMPS::BlockPublishStore::store
virtual amps_uint64_t store(const Message &message_)
Store a given message that will be delivered to AMPS.
Definition: BlockPublishStore.hpp:251
AMPS::BlockPublishStore::~BlockPublishStore
virtual ~BlockPublishStore()
Destructor that cleans up the buffer and other associated memory.
Definition: BlockPublishStore.hpp:241
AMPS::BlockStore::Block
Used as metadata for each block in a Buffer.
Definition: BlockStore.hpp:73
AMPS::BlockStore::signalAll
void signalAll()
Signal lock waiters.
Definition: BlockStore.hpp:190
AMPS::BlockStore::putAll
void putAll(Block *block_)
Return all Blocks starting with the given Block to the free list.
Definition: BlockStore.hpp:407
AMPS::BlockStore::front
Block * front() const
Get the first used block in the store.
Definition: BlockStore.hpp:230
AMPS::BlockStore::back
Block * back() const
Get the last used block in the store.
Definition: BlockStore.hpp:240
AMPS::BlockStore::addBlocks
void addBlocks(Block *blockArray_)
Allow users to create Block arrays during recovery that are tracked for cleanup here with all other B...
Definition: BlockStore.hpp:275
AMPS::BlockStore::setEndOfUsedList
void setEndOfUsedList(Block *block_)
Allow containing classes to initialize the used list in recovery.
Definition: BlockStore.hpp:266
AMPS::BlockStore::setUsedList
void setUsedList(Block *block_)
Allow containing classes to initialize the used list in recovery.
Definition: BlockStore.hpp:258
AMPS::BlockStore::resizeBuffer
Block * resizeBuffer(size_t size_, amps_uint32_t *pNewBlocks_)
Resize the buffer to the requested size, returning all new space.
Definition: BlockStore.hpp:483
AMPS::BlockStore::get
Block * get(amps_uint32_t numBlocksInChain_)
Get the requested number of Blocks as a chain from the free list.
Definition: BlockStore.hpp:285
AMPS::BlockStore::setFreeList
void setFreeList(Block *block_, amps_uint32_t freeCount_)
Allow containing classes to initialize the free list in recovery.
Definition: BlockStore.hpp:249
AMPS::BlockStore::getBuffer
Buffer * getBuffer()
Return the buffer underlying the store for direct write/read.
Definition: BlockStore.hpp:597
AMPS::BlockStore::setResizeHandler
void setResizeHandler(ResizeHandler resizeHandler_, void *userData_)
Set a resize handler that is called with the new total size of the Buffer.
Definition: BlockStore.hpp:220
AMPS::BlockStore::setBlockHeaderSize
amps_uint32_t setBlockHeaderSize(amps_uint32_t blockHeaderSize_)
Set the size to use for the header for all Blocks.
Definition: BlockStore.hpp:583
AMPS::BlockStore::setBlockSize
amps_uint32_t setBlockSize(amps_uint32_t blockSize_)
Set the size to use for all Blocks.
Definition: BlockStore.hpp:568
AMPS::BlockStore::init
void init()
Initialize, assuming that _buffer has no existing information.
Definition: BlockStore.hpp:439
AMPS::BlockStore::getBlockSize
amps_uint32_t getBlockSize() const
Get the size of each Block, as set in the constructor.
Definition: BlockStore.hpp:160
AMPS::BlockStore::wait
void wait()
Wait for a signal.
Definition: BlockStore.hpp:197
AMPS::BlockStore::getDefaultResizeBlocks
amps_uint32_t getDefaultResizeBlocks() const
Return the default number of blocks for each resize.
Definition: BlockStore.hpp:470
AMPS::BlockStore::getBlockHeaderSize
amps_uint32_t getBlockHeaderSize() const
Get the size of a header within each Block, as set in the constructor.
Definition: BlockStore.hpp:167
AMPS::BlockStore::put
void put(Block *block_)
Return the given chain of Blocks to the free list for reuse.
Definition: BlockStore.hpp:341
AMPS::Buffer
Abstract base class for implementing a buffer to be used by a StoreImpl for storage of publish messag...
Definition: Buffer.hpp:41
AMPS::Buffer::putUint64
virtual void putUint64(amps_uint64_t ui_)=0
Put an amps_uint64_t value into the buffer at the current position and advance past it.
AMPS::Buffer::putUint32
virtual void putUint32(amps_uint32_t i_)=0
Put an unsigned 32-bit int value into the buffer at the current position and advance past the end of ...
AMPS::Buffer::getSize
virtual size_t getSize() const =0
Get the current size of the Buffer in bytes.
AMPS::Buffer::getUint32
virtual amps_uint32_t getUint32()=0
Get the unsigned 32-bit int value at the current buffer position and advance past it.
AMPS::Buffer::putBytes
virtual void putBytes(const char *data_, size_t dataLength_)=0
Put the given length of bytes in data into the buffer at the current position and advance past them.
AMPS::Buffer::setPosition
virtual void setPosition(size_t position_)=0
Set the buffer postion to a location.
AMPS::Field
Field represents the value of a single field in a Message.
Definition: Field.hpp:88
AMPS::Field::len
size_t len() const
Returns the length of the data underlying this field.
Definition: Field.hpp:286
AMPS::Field::data
const char * data() const
Returns the (non-null-terminated) data underlying this field.
Definition: Field.hpp:279
AMPS::Message
Message encapsulates a single message sent to or received from an AMPS server, and provides methods f...
Definition: Message.hpp:518
AMPS::Message::assignExpiration
Message & assignExpiration(const std::string &v)
Assigns the value of the Expiration header for this Message without copying.
Definition: Message.hpp:1345
AMPS::Message::getRawFilter
void getRawFilter(const char **dataptr, size_t *sizeptr) const
Modifies the passed in arguments to reference the value of the Filter header of self in the underlyin...
Definition: Message.hpp:1346
AMPS::Message::getBookmark
Field getBookmark() const
Retrieves the value of the Bookmark header of the Message as a Field which references the underlying ...
Definition: Message.hpp:1234
AMPS::Message::getCommandId
Field getCommandId() const
Retrieves the value of the CommandId header of the Message as a Field which references the underlying...
Definition: Message.hpp:1342
AMPS::Message::getData
Field getData() const
Returns the data from this message.
Definition: Message.hpp:1500
AMPS::Message::assignOptions
Message & assignOptions(const std::string &v)
Assigns the value of the Options header for this Message without copying.
Definition: Message.hpp:1397
AMPS::Message::getCorrelationId
Field getCorrelationId() const
Retrieves the value of the CorrelationId header of the Message as a Field which references the underl...
Definition: Message.hpp:1344
AMPS::Message::getSowKeys
Field getSowKeys() const
Retrieves the value of the SowKeys header of the Message as a Field which references the underlying b...
Definition: Message.hpp:1465
AMPS::Message::getExpiration
Field getExpiration() const
Retrieves the value of the Expiration header of the Message as a Field which references the underlyin...
Definition: Message.hpp:1345
AMPS::Message::getFilter
Field getFilter() const
Retrieves the value of the Filter header of the Message as a Field which references the underlying bu...
Definition: Message.hpp:1346
AMPS::Message::assignFilter
Message & assignFilter(const std::string &v)
Assigns the value of the Filter header for this Message without copying.
Definition: Message.hpp:1346
AMPS::Message::setSequence
Message & setSequence(const std::string &v)
Sets the value of the Sequence header for this Message.
Definition: Message.hpp:1462
AMPS::Message::setAckTypeEnum
Message & setAckTypeEnum(unsigned ackType_)
Encode self's "ack type" field from a bitmask of values from AckType.
Definition: Message.hpp:1223
AMPS::Message::getAckTypeEnum
unsigned getAckTypeEnum() const
Decode self's "ack type" field and return the corresponding bitmask of values from AckType.
Definition: Message.hpp:1200
AMPS::Message::assignSowKeys
Message & assignSowKeys(const std::string &v)
Assigns the value of the SowKeys header for this Message without copying.
Definition: Message.hpp:1465
AMPS::Message::getRawSowKey
void getRawSowKey(const char **dataptr, size_t *sizeptr) const
Modifies the passed in arguments to reference the value of the SowKey header of self in the underlyin...
Definition: Message.hpp:1464
AMPS::Message::getRawCommandId
void getRawCommandId(const char **dataptr, size_t *sizeptr) const
Modifies the passed in arguments to reference the value of the CommandId header of self in the underl...
Definition: Message.hpp:1342
AMPS::Message::getRawExpiration
void getRawExpiration(const char **dataptr, size_t *sizeptr) const
Modifies the passed in arguments to reference the value of the Expiration header of self in the under...
Definition: Message.hpp:1345
AMPS::Message::getCommandEnum
Command::Type getCommandEnum() const
Decode self's "command" field and return one of the values from Command.
Definition: Message.hpp:1268
AMPS::Message::getRawBookmark
void getRawBookmark(const char **dataptr, size_t *sizeptr) const
Modifies the passed in arguments to reference the value of the Bookmark header of self in the underly...
Definition: Message.hpp:1234
AMPS::Message::getSowKey
Field getSowKey() const
Retrieves the value of the SowKey header of the Message as a Field which references the underlying bu...
Definition: Message.hpp:1464
AMPS::Message::assignTopic
Message & assignTopic(const std::string &v)
Assigns the value of the Topic header for this Message without copying.
Definition: Message.hpp:1489
AMPS::Message::getRawTopic
void getRawTopic(const char **dataptr, size_t *sizeptr) const
Modifies the passed in arguments to reference the value of the Topic header of self in the underlying...
Definition: Message.hpp:1489
AMPS::Message::setCommandEnum
Message & setCommandEnum(Command::Type command_)
Set self's "command" field from one of the values in Command.
Definition: Message.hpp:1328
AMPS::Message::assignCommandId
Message & assignCommandId(const std::string &v)
Assigns the value of the CommandId header for this Message without copying.
Definition: Message.hpp:1342
AMPS::Message::getTopic
Field getTopic() const
Retrieves the value of the Topic header of the Message as a Field which references the underlying buf...
Definition: Message.hpp:1489
AMPS::Message::getRawCorrelationId
void getRawCorrelationId(const char **dataptr, size_t *sizeptr) const
Modifies the passed in arguments to reference the value of the CorrelationId header of self in the un...
Definition: Message.hpp:1344
AMPS::Message::assignCorrelationId
Message & assignCorrelationId(const std::string &v)
Assigns the value of the CorrelationId header for this Message without copying.
Definition: Message.hpp:1344
AMPS::Message::assignBookmark
Message & assignBookmark(const std::string &v)
Assigns the value of the Bookmark header for this Message without copying.
Definition: Message.hpp:1234
AMPS::Message::getRawSowKeys
void getRawSowKeys(const char **dataptr, size_t *sizeptr) const
Modifies the passed in arguments to reference the value of the SowKeys header of self in the underlyi...
Definition: Message.hpp:1465
AMPS::Message::getOptions
Field getOptions() const
Retrieves the value of the Options header of the Message as a Field which references the underlying b...
Definition: Message.hpp:1356
AMPS::Message::assignSowKey
Message & assignSowKey(const std::string &v)
Assigns the value of the SowKey header for this Message without copying.
Definition: Message.hpp:1464
AMPS::StoreImpl
Abstract base class for storing published messages for an HA publisher client.
Definition: ampsplusplus.hpp:1098
AMPS::StoreImpl::getUnsetSequence
static amps_uint64_t getUnsetSequence()
Method to return the value used to represent no such sequence.
Definition: ampsplusplus.hpp:1167
AMPS::StoreReplayer
Abstract base class for replaying a publish message.
Definition: ampsplusplus.hpp:1070
AMPS::StoreReplayer::execute
virtual void execute(Message &message_)=0
Called by implementations of Store to replay a message from the store.